AP Photo

The four weeks of flooding across Pakistan are truly historic. More people have already been affected than the combined total of the 2004 Indian Ocean tsunami, 2005 Pakistani earthquake and 2010 Haiti earthquake. This catastrophe has already touched 17 million people and an area the size of the state of Florida.

We are witnessing a tragedy of epic and frightening proportions that precedes what experts predict will be further human suffering. Four weeks of heavy monsoon rains have produced wave after wave of deadly flood waters from the Indus, Kabul and Swat...